chrome/browser/chromeos/display/overscan_calibrator.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_CHROMEOS_DISPLAY_OVERSCAN_CALIBRATOR_H_
   6 #define CHROME_BROWSER_CHROMEOS_DISPLAY_OVERSCAN_CALIBRATOR_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "ui/compositor/layer_delegate.h"
  11 #include "ui/gfx/display.h"
  12 #include "ui/gfx/insets.h"
  13 #include "ui/gfx/rect.h"
  14
  15 namespace ui {
  16 class Layer;
  17 }
  18
  19 namespace chromeos {
  20
  21 // This is used to show the visible feedback to the user's operations for
  22 // calibrating display overscan settings.
  23 class OverscanCalibrator : public ui::LayerDelegate {
  24  public:
  25   OverscanCalibrator(const gfx::Display& target_display,
  26                      const gfx::Insets& initial_insets);
  27   virtual ~OverscanCalibrator();
  28
  29   // Commits the current insets data to the system.
  30   void Commit();
  31
  32   // Reset the overscan insets to default value.  If the display has
  33   // overscan, the default value is the display's default overscan
  34   // value. Otherwise, the default value is the old |initial_insets_|.
  35   void Reset();
  36
  37   // Updates the insets and redraw the visual feedback.
  38   void UpdateInsets(const gfx::Insets& insets);
  39
  40   const gfx::Insets& insets() const { return insets_; }
  41
  42  private:
  43   // ui::LayerDelegate overrides:
  44   virtual void OnPaintLayer(gfx::Canvas* canvas) override;
  45   virtual void OnDelegatedFrameDamage(
  46       const gfx::Rect& damage_rect_in_dip) override;
  47   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) override;
  48   virtual base::Closure PrepareForLayerBoundsChange() override;
  49
  50   // The target display.
  51   const gfx::Display display_;
  52
  53   // The current insets.
  54   gfx::Insets insets_;
  55
  56   // The insets initially given. Stored so we can undo the insets later.
  57   gfx::Insets initial_insets_;
  58
  59   // Whether the current insets are committed to the system or not.
  60   bool committed_;
  61
  62   // The visualization layer for the current calibration region.
  63   scoped_ptr<ui::Layer> calibration_layer_;
  64
  65   DISALLOW_COPY_AND_ASSIGN(OverscanCalibrator);
  66 };
  67
  68 }  // namespace chromeos
  69
  70 #endif  // CHROME_BROWSER_CHROMEOS_DISPLAY_OVERSCAN_CALIBRATOR_H_